We’ve carefully evaluated over 2,100 agencies worldwide and identified ten companies that best represent the industry. Our list is based on several key criteria, such as client testimonials, case studies, years of experience, and industry reputation. Learn more about our ranking criteria and how we identify the top agencies in the B2B lead generation industry.

The Number 1 B2B Lead Generation Agency as Selected by DesignRush Is...

Belkins Inc.

• Best for: Overall
• Average hourly rate: $50
• Minimum budget: $1,000 - $10,000
• Founded: 2017
• Size: 250-499
• Location: Dover, DE
• Notable clients: Deluxe Modular, Omnicharge, Mona, Sekisui, Kingbee Vans

Belkins is an expert in B2B lead generation in more than 15 industries, focusing on precise audience targeting and highly qualified B2B leads. Its teams of mid to senior-level lead acquisition specialists offer flexible, results-oriented strategies and initiatives to ensure a consistent stream of vetted leads for your business.

The B2B lead generation company has brought productive lead generation to dozens of B2B companies like Deluxe Modular. A New York-based construction company, Deluxe Modular, approached Belkins to help them create precise lead data, optimize outreach workflows, and build business inboxes. The agency also had to develop measures to increase the company’s email open rates.

Belkins started by building a clear lead generation workflow based on the client’s Ideal Customer Profile (ICP) and search data. It also developed an outreach campaign across multiple channels and introduced an email deliverability solution to boost open rates and address spam issues.

By the end of the first month, Belkins secured eight appointments and more than ten leads for follow-ups. After three months, it scheduled 30+ appointments. Some of these appointments eventually converted into close deals valued at over $2 million.

Check Belkins Inc. Agency Profile Here

UnboundB2B

• Best for: Demand generation
• Average hourly rate: Inquire
• Minimum budget: $25,000 - $50,000
• Founded: 2016
• Size: 500-999
• Location: Wilmington, DE
• Notable clients: Amazon Web Services, Delphix, Lacework, RingCentral, Dell Technologies

UnboundB2B specializes in qualified lead generation by building customer interest and demand for clients’ products and services. It uses precise targeting and intent data analysis to identify and engage with high-value prospects, while diverse strategic messaging helps solidify their interest in the client’s brand.

A US-based software company recently partnered with UnboundB2B to expand to niche markets and build its customer base. The company’s sales strategy was also faltering, so the agency had to find a solution that would result in a more productive sales pipeline.

UnboundB2B leveraged its expertise in highly qualified lead (HQL) generation and account-based marketing (ABM) strategies to identify key B2B decision-makers it targeted later with relevant content. In three months, the campaign generated nearly 1,180 high-quality leads, a 178% increase in conversion rates, and more than doubled the client’s initial ROI.

Check the UnboundB2B Agency Profile Here

Callbox

• Best for: AI-powered lead generation
• Average hourly rate: Inquire
• Minimum budget: Inquire
• Founded: 2004
• Size: 500-999
• Location: Los Angeles, CA
• Notable clients: Amazon, Google, SAP, Microsoft, Workday

From market research to appointment setting, Callbox offers comprehensive lead generation services tailored to the unique needs of your business. Clients can choose from human and AI-curated B2B leads that cover major and niche industries across 60+ countries.

A US B2B marketing solutions provider hired Callbox to help it reach out to prospects who were interested in client’s services. While most of the database existed already, the client couldn’t handle an extensive number of targets. The incomplete information in the database resulted in lower call quality and revenue.

To address these problems, Callbox conducted data cleansing, validated all database contacts, retrieved missing details, and removed duplicate entries. The agency then reached out to profiled contacts and scheduled appointments for them to learn more about the client’s products and services. Twelve weeks later, the client had 30% more deals closed per month, raising their potential revenue by $200,000 or more. Calls also increased by 16% to 150 on average per day, while call quality rose from 76% to 90%.

Check the Callbox Agency Profile Here

Martal Group

• Best for: B2B tech industry lead acquisition
• Average hourly rate: $45
• Minimum budget: $10,000-$25,000
• Founded: 2009
• Size: 50-99
• Location: Toronto, Canada
• Notable clients: Clickworker, Zoho, Bosch, Honeywell, Samsung

Trusted by startups and Fortune 500 companies alike, the Martal Group has provided thousands of qualified B2B leads to businesses worldwide. Its team of sales experts uses real-time data to track down prospects looking for products and services within the target industry and engage decision-makers with a fully customized outreach program. The agency also has extensive experience in lead generation solutions for tech companies, offering a calculated and data-driven approach to enable tech brands to stand out from the competition and accelerate growth.

Martal Group has been instrumental in the successful B2B sales pipeline for Clickworker, a large IT micro-tasking platform. Clickworker needed Martal to develop a go-to B2B market strategy for targeted segments, nurture warm leads and close contracts, and oversee the company’s overall sales and marketing processes.

Martal Group built a new revenue stream from scratch, closed deals with 60+ companies, including agreements with three Fortune 500 companies, and reinforced the entire marketing and service processes of Clickworker’s US operations. Since then, the Martal Group helped bring over $1.2 million in annual sales.

Check the Martal Group Agency Profile Here

SalesRoads

• Best for: Appointment setting
• Average hourly rate: Inquire
• Minimum budget: Inquire
• Founded: 2006
• Size: 100-249
• Location: Boca Raton, FL
• Notable clients: Parker Hannifin, Quest Diagnostics, Microsoft, Shell, Kuebix

SalesRoads uses conversation-based sales methodology to deliver exceptional B2B appointments to your business. It offers a comprehensive 4-week campaign plan that includes the creation of a sales playbook, a custom CRM setup and lead database, and sales development representative (SDR) training and support.

SalesRoads has partnered with Parker Hannifin, a leading motion control systems manufacturer, to help it identify new customers and expand further into existing markets. The B2B lead generation agency was also tasked to conduct an outbound lead-generation campaign to support these objectives.

After conducting a series of discovery sessions to determine the scope of the campaigns, SalesRoads sourced prospects from a trusted data provider according to set criteria, while sales-qualified leads (SQLs) were processed and distributed to Parker Hannifin’s distributors. Personal visits and follow-ups were also conducted to further qualify and identify opportunities. In total, SalesRoads identified over 540 SQLs for the client, bringing an estimated value of $25 million per year.

Check SalesRoads Agency Profile Here

The Telemarketing Company

• Best for: Telephone-based lead generation
• Average hourly rate: $50
• Minimum budget: $1,000 - $10,000
• Founded: 1990
• Size: 100-249
• Location: Brighton, United Kingdom
• Notable clients: Equifax, TechData, Western Union, Miele, Amazon Shipping

The Telemarketing Company (TTMC) is among the world’s leading specialists in telephone-based lead management, demand creation, and data services. The agency employs hundreds of marketing specialists to provide multilingual B2B lead generation services to companies, including blue-chip organizations, worldwide. It also provides bespoke solutions that address the complex and evolving requirements of its customers.

TTMC has been an invaluable partner for industry leaders like Equifax, one of America’s largest credit reporting agencies. Facing a series of challenges with its previous marketing and operations model, Equifax approached TTMC to develop and implement a ‘best-in-class’ demand generation and operation strategy. The agency also had to improve lead quality, streamline processes, and reduce lead response times.

In collaboration with a B2B digital specialist, TTMC developed a comprehensive onboarding program to map out the new processes. It also streamlined lead management, including setting up inbound phone lines to manage phone inquiries and conduct a thorough sales qualification process. As a result, Equifax hit its marketing lead targets, with sales teams increasing high-quality leads by 131% and 300% more opportunity value year on year.

Check The Telemarketing Company Agency Profile Here

Ironpaper

• Best for: B2B companies with long or complex sales processes
• Average hourly rate: Inquire
• Minimum budget: Inquire
• Founded: 2002
• Size: Under 49
• Location: New York, NY
• Notable clients: Shell Catalysts & Technologies, Goddard Technologies, Steelcase, PCS Software, CrossFit

Ironpaper is a digital growth specialist that helps B2B clients achieve growth through qualified lead acquisition, account-based marketing, demand generation, and inbound marketing strategies. Its goal is to enable businesses to engage qualified buyers, improve lead acquisition rates, and accelerate their sales pipeline.

One of Ironpaper’s more notable clients was Shell’s new Catalysts & Technologies business. As it started to build its marketing capabilities, the company delegated Ironpaper to kickstart its lead-generation processes.

After establishing its digital foundations, Ironpaper launched a series of initiatives to generate followers, increase leads, and flesh out the customer journey. This involved launching highly optimized paid ad campaigns, creating ABM-driven microsites, and generating content targeting key stakeholders. Following its successful launch, Shell Catalysts & Technologies saw a 44% increase in leads generated per week with a 6.2% higher website-to-lead conversion rate.

Check the Ironpaper Agency Profile Here

Respect.Studio

• Best for: LinkedIn B2B lead generation
• Average hourly rate: $100
• Minimum budget: $10,000 - $25,000
• Founded: 2016
• Size: Under 49
• Location: Lviv, Ukraine
• Notable clients: Paragon, SAP, Bayer, Microsoft, Salesforce

Respect.Studio offers its skills and expertise in building high-value lead generation strategies and establishing relationships with key decision-makers in the B2B industry through the LinkedIn network. Its services include identifying ideal prospects on LinkedIn, developing outreach strategies, and managing lead databases, among others. The B2B lead generation firm combines and optimizes those activities to maximize sales opportunities and conversions.

Respect.Studio’s lead generation campaign for Paragon, a US-based facility management company, showcases how LinkedIn lead generation and messaging can result in hot leads. Paragon turned to Respect.Studio to help them expand their industry connections through LinkedIn and attract large companies from the consumer goods, logistics, and supply chain industry.

Taking a more quality-oriented approach to outreach, Respect.Studio engaged with prospects with hyper-personalized messaging highlighting the client’s experience with enterprise-level companies. The B2B lead generation agency also helped polish Paragon’s LinkedIn profile to make it more credible and trustworthy. This eventually proved worth the effort, as Paragon had a 290% increase in visits without spending a single dollar on ads. The client’s LinkedIn Social Selling Index (SSI) rank also rose to 62, which was 3x higher than the industry average.

Check Respect.Studio Agency Profile Here

SalesAR

• Best for: Prospect research
• Average hourly rate: $25
• Minimum budget: $1,000 - $10,000
• Founded: 2019
• Size: 100-249
• Location: Kyiv, Ukraine
• Notable clients: Bulu Group, SoftServe Business Systems, Pharmax, Tricent, Runit Systems

SalesAR offers lead research and appointment-setting services using tried-and-tested in-house methodologies to boost income and brand visibility. It uses the latest tools, technology, and practices throughout the lead generation processes and has experience working with B2B clients across 40+ industries. The agency provides anti-spam services to improve email deliverability and the overall success of outreach campaigns.

The Bulu Group, an online marketplace solutions provider known for their signature ‘Bulu Box,’ partnered with SalesAR to secure qualified leads and transition them to their sales pipeline. The leads also had to meet distinct ICP criteria and must align with the company’s interests in the food, nutrition, vitamins, supplements, and pet industries.

SalesAR took a structured yet highly adaptable approach to lead generation with the client’s unique requirements. This included fortifying Bulu Group’s existing database with 1,000 new diverse leads, fully customized content adapted to the campaign’s needs, and dynamic outreach to prospects on LinkedIn and email. This multi-pronged strategy resulted in 5,000 new contacts, including 15 successfully booked appointments.

Check the SalesAR Agency Profile Here

Inside Global

• Best for: Real-time comprehensive reporting services
• Average hourly rate: Inquire
• Minimum budget: Inquire
• Founded: 2010
• Size: 100-249
• Location: Liverpool, United Kingdom
• Notable clients: GE Digital, Cap Gemini, Accenture, Broadcom, Oracle

Inside Global delivers industry-leading B2B sales outsourcing services, including all the stages of the lead generation pipelines, supporting database management, and reporting tasks. Whether it’s email, targeted LinkedIn messages, or phone calls, Inside Global delivers sales-qualified leads aligned with the client’s business goals. It also provides comprehensive monthly reports detailing the current state of lead generation campaigns for accounts based on vertical or location.

Inside Global has had successful partnerships with international tech companies like Ge Digital. A subsidiary of General Electric specializing in the Industrialized Internet of Things (IIoT), GE Digital turned to Inside Global to grow its sales pipeline in line with its revenue targets. Filling a huge pipeline gap across multiple markets in Europe and the Middle East with direct and channel leads was challenging.

To deliver the leads needed, Inside Global took on an ABM approach during the prospecting process. This enabled the agency to generate eligible leads that accelerated opportunities and generated revenue. Within two months, Inside Global generated 89 eligible leads that continue to grow. South African and Turkish markets adopted the ABM approach to lead generation, resulting in the pipeline expected to close at around $5 million.

Check Inside Global Agency Profile Here

How We Picked the B2B Lead Generation Companies

We base our selection of the top B2B lead generation companies on customer feedback, case studies, industry expertise, client portfolio, and other factors. Our agency experts have also developed a scoring system to assess each agency’s overall performance according to the following metrics:

• Reviews: Quality of work and services rendered and the client’s feedback and satisfaction
• Portfolio: The agency's professional experience and capabilities
• Awards and certification: Industry reputation and recognition of the agency’s merits
• Team bios: Showcases the credentials and expertise of each team member and their dynamics
• Top services: Core competencies and specialization

You can also check out the DesignRush Agency Ranking Methodology for more information on how we research agencies. for more information on how we research agencies.